A fatigue test device for crane pipes

Abstract

The present invention relates to the field of test facilities, and in particular to a fatigue test device for crane pipes, comprising a test bench, a threaded member installed on one side of the upper end of the test bench, two main clamping rings symmetrically installed on the ends of the threaded member, the two main clamping rings being arranged horizontally, a test piece installed on the other side of the upper end of the test bench, the end of the test piece being connected to a frame, two auxiliary clamping rings symmetrically and elastically installed on the inner side of the frame, the two auxiliary clamping rings being arranged vertically, a push rod slidably installed above the frame, both ends of the push rod being connected to clamping frames, one end of the two clamping frames being connected to the two auxiliary clamping rings respectively. The present invention improves the convenience of fatigue testing and ensures the normal conduct of fatigue testing, while also ensuring that the crane pipe will not become loose during the test.

Description

Technical Field

[0001] The invention relates to the field of test facilities, in particular to a crane pipe fatigue test device. Background Art

[0002] A crane pipe, also known as a fluid loading and unloading arm, is a retractable and movable pipe connected to rigid pipes and elbows using a rotary joint to achieve a flexible connection for transmitting liquid media between trains, tank cars, and trestle storage and transportation pipelines. To ensure the quality of the crane pipe, fatigue testing is usually required on the tightening joints of the crane pipe.

[0003] However, during use, the existing test device needs to first lock and fix the horizontal section of the crane pipe, and then lock and fix the vertical section of the crane pipe before the fatigue test can be carried out. The operation process requires secondary locking to fix the crane pipe. The fixing process is quite cumbersome, which seriously affects the convenience of the fatigue test. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a crane pipe fatigue test device.

[0005] To achieve the above objectives, the technical solution adopted in the present invention is: a fatigue test device for a crane pipe, comprising a test bench, a threaded part is installed on one side of the upper end of the test bench, two main clamping rings are symmetrically installed on the end of the threaded part, and the two main clamping rings are horizontally arranged; a test piece is installed on the other side of the upper end of the test bench, the end of the test piece is connected to a frame, two auxiliary clamping rings are symmetrically and elastically installed on the inner side of the frame, and the two auxiliary clamping rings are vertically arranged; a push rod is slidably installed above the frame, both ends of the push rod are connected to clamping frames, one end of the two clamping frames is respectively connected to the two auxiliary clamping rings, a push wheel is connected to the middle of the push rod, and a ring rail is fitted on the side of the push wheel, and the ring rail is connected to the threaded part.

[0006] Preferably, guide pillars are fixedly installed on the lower parts of the opposite ends of the two auxiliary clamping rings, and the two guide pillars respectively extend through the front and rear ends of the frame. The guide pillars are slidably fitted with the frame, and the ends of the guide pillars are coaxially inlaid with column caps. A reset spring is wound around the outside of the guide pillars, one end of the reset spring is fixed to the column cap, and the other end of the reset spring is fixed to the frame.

[0007] Preferably, a guide shell is embedded in the side corner of the frame, a rod guide seat is slidably installed inside the guide shell, the rod guide seat passes through the end of the guide shell, the end of the rod guide seat is fixed to the push rod, and a wheel seat is installed on the outer side of the push wheel, and the end of the wheel seat is fixed to the push rod.

[0008] Preferably, a No. 1 lug extends from the middle of the opposite ends of the two auxiliary clamping rings, one end of the clamping frame is rotatably connected to the end of the No. 1 lug, and the other end of the clamping frame is rotatably mounted with a No. 2 lug, and the end of the No. 2 lug is fixed to the push rod.

[0009] Preferably, the threaded part includes a main frame fixedly installed on one side of the upper end of the test bench, a connecting frame fixedly installed on the rear end of the main frame, a threaded rod rotatably installed on the end of the connecting frame, the threads at both ends of the threaded rod are symmetrically arranged, and two threaded sleeves are symmetrically tightened on the outer surface of the threaded rod, and the upper ends of the two threaded sleeves are fixedly installed with fixed ring frames, and the ends of the two fixed ring frames are respectively fixed to the two main clamping rings, and the ends of the main frame are fixedly installed with positioning support rings.

[0010] Preferably, a guide frame is fixedly installed on the lower end of the connecting frame, and a concave groove extends from the lower end of the threaded sleeve, and the concave groove is slidably installed on the outer surface of the guide frame. A push ring frame is fixedly installed on the front end of one of the threaded sleeves, and the push ring frame slides through the side of the main frame. The end of the push ring frame is fixed to the ring rail, and the center line of the positioning support ring is collinear with the center line of the ring rail.

[0011] Preferably, the test piece includes a sub-frame fixedly mounted on the other side of the upper end of the test bench, a load-bearing shaft is rotatably mounted on the end of the sub-frame, the center line of the load-bearing shaft is collinear with the center line of the positioning support ring, a swing frame is fixedly mounted on one end of the load-bearing shaft, the end of the swing frame is fixed to the frame, a gear is coaxially embedded on the other end of the load-bearing shaft, a tooth plate is meshed with the lower part of the gear, a T-shaped slide plate extends from the side of the tooth plate, and the T-shaped slide plate is slidably mounted on the sub-frame.

[0012] Preferably, a motor frame is provided on the other side of the upper end of the test bench near the side of the sub-frame, a servo motor is fixedly installed on the end of the motor frame, a frame ear is embedded in the output end of the servo motor, a push plate frame is rotatably installed on the end of the frame ear, and the end of the push plate frame is rotatably connected to the gear plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By rotating the threaded rod, the two threaded sleeves can be driven to move toward each other under the action of the symmetrical arrangement of the threads at both ends of the threaded rod, thereby driving the two main clamping rings to move toward each other to clamp the horizontal section of the crane pipe. In this process, the moving threaded sleeve will also drive the ring rail to move through the push ring frame, so as to push the push wheel through the ring rail to allow the push rod to move. At this time, the rod guide seat slides in the guide shell to guide the push rod, so that the moving push rod drives the two clamping frames to move, so as to push the auxiliary clamping ring, so that the two auxiliary clamping rings can move toward each other to clamp the vertical section of the crane pipe. In this way, the crane pipe can be fixed by a single locking, and the process does not require a secondary locking operation, which effectively improves the convenience of fatigue testing.

[0015] 2. When the swing frame is swinging to drive the vertical section of the crane pipe to swing, the push wheel will synchronously roll back and forth in a circular arc on the ring rail to adapt to the swinging movement of the vertical section of the crane pipe to ensure the normal progress of the fatigue test. At the same time, during the test, it can also ensure that the ring rail always tightens the push wheel, and then tightens the auxiliary clamping ring moving in opposite directions, so that the auxiliary clamping ring can always keep holding the crane pipe tightly, thereby ensuring that the crane pipe will not loosen during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a crane pipe fatigue test device according to the present invention;

[0017] Figure 2 The present invention is a crane pipe fatigue test device Figure 1 A magnified view of middle A;

[0018] Figure 3 This is a schematic diagram of a secondary clamp ring of a crane tube fatigue test device according to the present invention;

[0019] Figure 4 This is a schematic diagram of a reset spring for a crane pipe fatigue test device according to the present invention;

[0020] Figure 5 This is a schematic diagram of a main clamping ring of a crane pipe fatigue test device according to the present invention;

[0021] Figure 6 This is a usage view of a crane pipe fatigue test device according to the present invention.

[0022] In the figure: 1. test bench; 2. main frame; 3. push ring frame; 4. connecting frame; 5. main clamping ring; 6. positioning support ring; 7. ring rail; 8. auxiliary clamping ring; 9. auxiliary frame; 10. servo motor; 11. motor frame; 12. threaded rod; 13. fixing ring frame; 14. threaded sleeve; 15. concave groove; 16. guide frame; 17. load-bearing shaft; 18. swing frame; 19. gear; 20. tooth plate; 21. T-shaped slide plate; 22. push plate frame; 23. frame ear; 24. push rod; 25. push wheel; 26. clamping frame; 27. frame; 28. guide column; 29. ​​reset spring; 30. No. 1 lug; 31. wheel seat; 32. column cap; 33. guide shell; 34. rod guide seat; 35. No. 2 lug; 36. crane pipe. DETAILED DESCRIPTION

[0023] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0024] like Figures 1-6 The fatigue test device for crane pipes shown in the figure comprises a test bench 1, a threaded part is installed on one side of the upper end of the test bench 1, and two main clamping rings 5 ​​are symmetrically installed at the ends of the threaded part. The two main clamping rings 5 ​​are arranged horizontally and can adapt to the horizontal section of the crane pipe 36 for clamping. A test piece is installed on the other side of the upper end of the test bench 1, and the end of the test piece is connected to a frame 27. Two auxiliary clamping rings 8 are symmetrically elastically installed on the inner side of the frame 27. The frame 27 plays a role in bearing the auxiliary clamping rings 8. The two auxiliary clamping rings 8 are arranged vertically and can adapt to the horizontal section of the crane pipe 36. The vertical section of the crane pipe 36 should be tightly clamped, and a push rod 24 is slidably installed on the top of the frame 27. Both ends of the push rod 24 are connected to clamping frames 26. The push rod 24 drives the clamping frames 26 to move. One end of the two clamping frames 26 is respectively connected to the two auxiliary clamping rings 8, and the clamping frames 26 push the auxiliary clamping rings 8. The middle part of the push rod 24 is connected to a push wheel 25, and the side of the push wheel 25 is fitted with a ring rail 7. The ring rail 7 is connected to a threaded part, and the ring rail 7 can push the push wheel 25, thereby moving the push rod 24.

[0025] Guide posts 28 are fixedly installed on the lower parts of the opposite ends of the two auxiliary clamping rings 8. The two guide posts 28 extend from the front and rear ends of the frame 27 respectively. The guide posts 28 guide the auxiliary clamping rings 8. The guide posts 28 slide in conjunction with the frame 27. The ends of the guide posts 28 are coaxially inlaid with post caps 32. The outer sides of the guide posts 28 are wrapped with return springs 29. The post caps 32 are pushed by the return springs 29. One end of the return spring 29 is fixed to the post cap 32, and the other end of the return spring 29 is fixed to the frame 27. The return spring 29 can reset the auxiliary clamping ring 8 after movement.

[0026] A guide shell 33 is embedded in the side corner of the frame 27, and a rod guide seat 34 is slidably installed inside the guide shell 33. The guide shell 33 and the rod guide seat 34 guide the push rod 24. The rod guide seat 34 extends from the end of the guide shell 33. The end of the rod guide seat 34 is fixed to the push rod 24. A wheel seat 31 is installed on the outside of the push wheel 25. The wheel seat 31 supports the push wheel 25, and the end of the wheel seat 31 is fixed to the push rod 24.

[0027] A No. 1 lug 30 extends from the middle of the opposite ends of the two auxiliary clamping rings 8. One end of the clamping frame 26 is rotatably connected to the end of the No. 1 lug 30. The No. 1 lug 30 serves to facilitate the connection of the clamping frame 26. A No. 2 lug 35 is rotatably installed on the other end of the clamping frame 26. The end of the No. 2 lug 35 is fixed to the push rod 24. The No. 2 lug 35 serves to facilitate the connection of the clamping frame 26.

[0028] The threaded part includes a main frame 2 fixedly installed on one side of the upper end of the test bench 1, and a connecting frame 4 is fixedly installed on the rear end of the main frame 2. The main frame 2 plays the role of supporting the positioning support ring 6. The end of the connecting frame 4 is rotatably installed with a threaded rod 12, and the connecting frame 4 plays the role of supporting the threaded rod 12. The threads at both ends of the threaded rod 12 are symmetrically arranged, which can drive the two threaded sleeves 14 to move toward each other, thereby driving the two main clamping rings 5 ​​to move toward each other. The outer surface of the threaded rod 12 is symmetrically tightened with two threaded sleeves 14, and the upper ends of the two threaded sleeves 14 are fixedly installed with a fixing ring frame 13. The fixing ring frame 13 plays the role of fixing the threaded sleeve 14 and the main clamping ring 5 together. The ends of the two fixing ring frames 13 are respectively fixed to the two main clamping rings 5. The end of the main frame 2 is fixedly installed with a positioning support ring 6. The positioning support ring 6 can position the crane pipe 36 so that the rotation center of the rotary joint of the crane pipe 36 can be coaxial with the load-bearing shaft 17 to ensure that the vertical section of the crane pipe 36 will not be hindered when it is subsequently driven to swing.

[0029] A guide frame 16 is fixedly installed at the lower end of the connecting frame 4, and a concave groove 15 extends from the lower end of the threaded sleeve 14. The guide frame 16 and the concave groove 15 serve to guide the threaded sleeve 14. The concave groove 15 is slidably installed on the outer surface of the guide frame 16. A push ring frame 3 is fixedly installed at the front end of one of the threaded sleeves 14. The push ring frame 3 slides through the side of the main frame 2. On the one hand, the push ring frame 3 serves to fix the ring rail 7 and one of the threaded sleeves 14 together. On the other hand, the push ring frame 3 can slide on the main frame 2 to guide the ring rail 7. The end of the push ring frame 3 is fixed to the ring rail 7, and the center line of the positioning support ring 6 is collinear with the center line of the ring rail 7, which can ensure that the push wheel 25 always rolls on the ring rail 7 when the vertical section pipeline of the crane pipe 36 swings.

[0030] The test piece includes a sub-frame 9 fixedly mounted on the other side of the upper end of the test bench 1, and a load-bearing shaft 17 is rotatably mounted on the end of the sub-frame 9. The sub-frame 9 supports the load-bearing shaft 17, and the center line of the load-bearing shaft 17 is collinear with the center line of the positioning ring 6. A swing frame 18 is fixedly mounted on one end of the load-bearing shaft 17, and the end of the swing frame 18 is fixed to the frame 27. The swing frame 18 drives the frame 27 to swing. A gear 19 is coaxially inlaid on the other end of the load-bearing shaft 17, and a tooth plate 20 is meshed with the lower part of the gear 19. A T-shaped slide 21 extends from the side of the tooth plate 20. The tooth plate 20 can drive the gear 19 to rotate. The T-shaped slide 21 is slidably mounted on the sub-frame 9, and the T-shaped slide 21 guides the tooth plate 20.

[0031] A motor frame 11 is provided on the other side of the upper end of the test bench 1 near the side of the sub-frame 9, and a servo motor 10 is fixedly installed on the end of the motor frame 11. The motor frame 11 plays a role in supporting and fixing the servo motor 10. The output end of the servo motor 10 is inlaid with a frame ear 23, and the end of the frame ear 23 is rotatably installed with a push plate frame 22. The frame ear 23 plays a role in driving the push plate frame 22 to move. The end of the push plate frame 22 is rotatably connected to the tooth plate 20, and the push plate frame 22 plays a role in driving the tooth plate 20 to reciprocate.

[0032] During the test, the crane pipe 36 is placed on the positioning support ring 6 for positioning, and then the threaded rod 12 is rotated to drive the two threaded sleeves 14 to move toward each other under the action of the symmetrical arrangement of the threads at both ends of the threaded rod 12, thereby driving the two main clamping rings 5 ​​to move toward each other to hold the horizontal section of the crane pipe 36 tightly. In this process, the moving threaded sleeve 14 will also drive the ring rail 7 to move through the push ring frame 3, so as to push the push wheel 25 through the ring rail 7 to allow the push rod 24 to move. At this time, the rod guide seat 34 slides in the guide housing 33 to guide the push rod 24, so as to use the moving push rod 24 to drive the two clamping frames 26 to move, so as to push the auxiliary clamping ring 8. The two auxiliary clamping rings 8 move toward each other to hold the vertical section of the crane pipe 36 tightly. Then the servo motor 10 works to drive the frame ear 23 to rotate, and the rotating frame ear 23 drives the push plate frame 22 to move, so as to push the tooth plate 20, so that the tooth plate 20 can move back and forth. At this time, the T-shaped slide 21 slides on the auxiliary frame 9 to guide the tooth plate 20, so that the reciprocating tooth plate 20 drives the gear 19 to rotate, and then drives the swing frame 18 on the load-bearing shaft 17 to swing. At this time, the vertical section of the crane pipe 36 swings synchronously under the drive of the swing frame 18, so as to perform a fatigue test on the rotary joint of the crane pipe 36.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane pipe fatigue test device, comprising a test bench (1), characterized in that: A threaded part is installed on one side of the upper end of the test bench (1), and two main clamping rings (5) are symmetrically installed on the end of the threaded part, and the two main clamping rings (5) are arranged horizontally. A test piece is installed on the other side of the upper end of the test bench (1), and the end of the test piece is connected to a frame (27). Two auxiliary clamping rings (8) are symmetrically and elastically installed on the inner side of the frame (27), and the two auxiliary clamping rings (8) are arranged vertically. A push rod (24) is slidably installed above the frame (27), and both ends of the push rod (24) are connected to a clamping frame (26), and one end of the two clamping frames (26) is respectively connected to the two auxiliary clamping rings (8). A push wheel (25) is connected to the middle of the push rod (24), and a ring rail (7) is fitted on the side of the push wheel (25), and the ring rail (7) is connected to the threaded part; A guide housing (33) is embedded in the side corner of the frame (27), a rod guide seat (34) is slidably installed inside the guide housing (33), the rod guide seat (34) extends from the end of the guide housing (33), the end of the rod guide seat (34) is fixed to the push rod (24), and a wheel seat (31) is installed on the outer side of the push wheel (25), and the end of the wheel seat (31) is fixed to the push rod (24); The threaded member comprises a main frame (2) fixedly mounted on one side of the upper end of the test bench (1), a connecting frame (4) fixedly mounted on the rear end of the main frame (2), a threaded rod (12) rotatably mounted on the end of the connecting frame (4), the threads at both ends of the threaded rod (12) being symmetrically arranged, two threaded sleeves (14) being symmetrically screwed on the outer surface of the threaded rod (12), a fixed ring frame (13) being fixedly mounted on the upper ends of the two threaded sleeves (14), the ends of the two fixed ring frames (13) being fixed to the two main clamping rings (5) respectively, and a positioning support ring (6) being fixedly mounted on the end of the main frame (2); A guide frame (16) is fixedly mounted on the lower end of the connecting frame (4), a concave groove (15) is extended from the lower end of the threaded sleeve (14), and the concave groove (15) is slidably mounted on the outer surface of the guide frame (16), and a push ring frame (3) is fixedly mounted on the front end of one of the threaded sleeves (14), and the push ring frame (3) slides through the side of the main frame (2), and the end of the push ring frame (3) is fixed to the ring rail (7), and the center line of the positioning support ring (6) is collinear with the center line of the ring rail (7).

2. The crane pipe fatigue test device according to claim 1, characterized in that: Guide posts (28) are fixedly mounted on the lower portions of the opposite ends of the two auxiliary clamping rings (8), and the two guide posts (28) extend through the front and rear ends of the frame (27) respectively. The guide posts (28) are slidably engaged with the frame (27), and a post cap (32) is coaxially embedded at the end of the guide post (28). A return spring (29) is wound around the outer side of the guide post (28), and one end of the return spring (29) is fixed to the post cap (32), and the other end of the return spring (29) is fixed to the frame (27).

3. The fatigue testing device for crane pipes according to claim 1, characterized in that: A No. 1 lug (30) extends from the middle of the opposite ends of the two auxiliary clamping rings (8), one end of the clamping frame (26) is rotatably connected to the end of the No. 1 lug (30), and the other end of the clamping frame (26) is rotatably mounted with a No. 2 lug (35), and the end of the No. 2 lug (35) is fixed to the push rod (24).

4. The crane pipe fatigue test device according to claim 1, characterized in that: The test piece includes a sub-frame (9) fixedly mounted on the other side of the upper end of the test bench (1), a load-bearing shaft (17) is rotatably mounted on the end of the sub-frame (9), the center line of the load-bearing shaft (17) is collinear with the center line of the positioning support ring (6), a swing frame (18) is fixedly mounted on one end of the load-bearing shaft (17), the end of the swing frame (18) is fixed to the frame (27), a gear (19) is coaxially embedded on the other end of the load-bearing shaft (17), a tooth plate (20) is meshed with the lower part of the gear (19), a T-shaped slide plate (21) extends from the side of the tooth plate (20), and the T-shaped slide plate (21) is slidably mounted on the sub-frame (9).

5. The crane pipe fatigue test device according to claim 4, characterized in that: A motor frame (11) is provided on the other side of the upper end of the test bench (1) near the side of the sub-frame (9), a servo motor (10) is fixedly mounted on the end of the motor frame (11), a frame ear (23) is embedded in the output end of the servo motor (10), a push plate frame (22) is rotatably mounted on the end of the frame ear (23), and the end of the push plate frame (22) is rotatably connected to the gear plate (20).

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